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US 12,609,324 B2Granted
Lithium-ion battery and formation method thereof
AssigneeCALB Co., Ltd.
InventorsXu Li, Chen Cao, Song Hua, Guangkuo Gao, Dongdong Zheng
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AssigneeCALB Co., Ltd.
InventorsXu Li, Chen Cao, Song Hua, Guangkuo Gao, Dongdong Zheng
Estimating the term…
A lithium-ion battery and a method of preparing the same are provided. The lithium-ion battery includes a cell and an electrolyte solution, and the cell includes a negative electrode sheet. The negative electrode sheet includes a negative electrode current collector, an active coating layer disposed on a surface of the current collector, and a protective coating layer disposed on a surface of the active coating layer. The protective coating layer is a solid-state electrolyte coating layer. The electrolyte solution contains a film-forming agent. The method includes the following steps. After the cell is placed in a casing and the electrolyte solution is injected, formation is performed on the lithium-ion battery. The formation includes: S1, performing charging to 3.4V to 3.75V with a constant current rate of 0.02C to 0.04C; and S2, performing charging to 3.75V to 4.25V with a constant current rate of 0.05C to 0.3C.
A lithium-ion battery comprising a negative electrode sheet, wherein the negative electrode sheet comprises a negative electrode current collector, an active coating layer disposed on a surface of the negative electrode current collector, and a protective coating layer disposed on a surface of the active coating layer, the protective coating layer is a solid-state electrolyte coating layer, a solid-state electrolyte of the solid-state electrolyte coating layer is selected from one or more of Li1+xAlxTi2−x(PO4)3, where 0<x<2, and Li3xLa2/3−xTiO3, where 0<x<⅔, and a molar ratio of a content of Ti4+ to a content of Ti3+ in the protective coating layer is 1:0.1 to 1:1.
Dependencies are inferred from the claim text.